Drag-line excavator



I.' F. FITZPAIHICK.- DRAG LINE EXCAVATOR.vv APPLICATION FILED OCT- 3I. 192i;

-Patele D60. 12, .1922;

Patented Dec. 12, i922.

' srnrgs Ltd rgaler y DRAG-LINE EXCAVATOR.

. iippiieanon` ined october ai, 192i. seriai no. siiei.

To all whom t may concern:

Be it known that I, JosnrH F. Frrzrfi'rnien, a citizen ot the United States, residing to provide a scraping at Worcester, in the county of Worcester and State of Massachusetts have invented a new and useful Drag-Line Excavator, of which the `following is a specification.

Thisinvention relates to an excavator of the type in which a bucketor the `like having a scraping edge is drawn, preferably by as` to project thescraping edge below the surface of the ground and ifill the bucket. The bucket is then drawn along further to the point at` which it is to be dumped. This invention relates to the bucket independentI of the mechanism vfordia, ggirig it alongor emptying it.

power, in such a way The principal objects of this invention are` blade on thebiicket in such relation to it that it will automatically be `turned down into a position to dig into theearth as the bucket is dragged along; and to provide an arrangement whereby the blade will be turned up into a position level with the surface ot the` ground automatically when the bucket is illed so that there will be not Jfurther scraping action and the resistance to the dragging of the bucket along the ground, due to that cause, will be removed. The invention also involves improved means by which the scraping blade is turned from onelposition to theother and other details of construction and'combinations of parts as will appear hereinafter` Reference is to be had to the accompanying-drawings, in which Fig. 1 is a longitudinal sectional View of `a drag line bucket constructed in accordance withv this invention, showing it in position for digging into the ground and filling;

Fig. 2 is a front elevation of the bucket,`

showing it in filled; i

Figris a sectional View on the line 33 of Finne, showing the bucket in the position when filled and being dragged along; and

Fig. et is a plan of the bucket showny in the same position.

I have shown the invention as comprising a bucket provided with parallel side walls 10, connected by a cross bar 11, in front and a separate crossbar 12 in the rear. The latter cross bar consists of bar stock bent at its ends at right angles to engage the rear ends of the side walls 10 and secured thereto by fastening devices 13. The cross bar 11- is' theiposition it assumes when provided withreduced screw threaded ends sides 1'0. Thus, the cross bar y11 securely holdsthe sides'in position at the front.

Onthe front ends of theside pieces 10 are shackles or hooks 15 connected with ca-l bles 16 used tor drawing the device along.

It `will be understoodthat any other ared to swing thereon, rThis"scraper consti.-

`tutes the rear and part of the bottom ot the bucket. The scraper 23 isprovided with a pluralityr of teeth 24 projecting therefrom forward from the bottomand in alignment 'having nuts 14 thereon to fasten them to the v j foreis mounted on the studs 20 and adapt- .l

with` eachother across the bottom of the scraper` 23. This scraper is shown of a concave form and made of sheet metal or the like. llVhen it is in the position shown in Fig. `3 it rests back against the cross bar 12. l

At its upper end itis provided with an upwardly extending bracket 26 which is connected by a spring 27 `with a connector 28. Thisconnector 28 has a hook'QQat the end which extends more than halt way around the cylindrical cross bar 11 and is pivoted thereon.` i

The spring is so made and adjusted that when it is allowed to contract it pulls the scraper 23 forward at its top into the posij ytion shown in Fig. 1. Now it the bucket is drawn alongv `the ground and held down of its flat bottom against the ground. n

this way the fillingaction is very elicient and this eliiciency is secured without any undue resistance to the dragging of the bucket along the ground; Furthermore, no

[against itss'urface the teeth 24 will dig into l .the ground as shown in Fig. 1. As the attention has to bepaid to the operation of fillingas the device works entirely automatically. Furthermore, if the action of lling is not fully accomplished during they first part of the travel, the teeth are left projecting below the surface of the earth and will be able to collect additional earth in the bucket at a later periods? Thus, `if they area worked over is sufficient, the device is certain to be filled atv each operation. The bucket is emptied in any usual way. Vhen returned'back to the vplace where itA iside,-k

sired to dig, the bucket automaticallymoves into the position shown in Fig. l ready to dig in at the commencementof its forward motion. ln thisway `efficiency is increased and expensive operation reduced.

Although l have illustrated and described only a single form of the `invention I am aware of the fact that modifications can be made thereinby Yany person skilled in the art without departing from the Vscope of the 2. A drag line excavator comprising a" bucket adapted to be dragged along the ground, having a rearwall tiltingly mounted thereon and provided with a row of teeth on the bottom adapted to be projected below the surface ofthe ground, and yieldingl means for lioldin'gsaid teeth in that jwsition. 3. A drag linef excavator comprising a bucket adapted `to be dragged along the ground, having a concave rear wall mounted thereon, the rear wall being mounted on pivots located at theI bottom and n'earthe rear of t-he bucket and extending from said pivots upwardly, whereby when filled with earth the weight of the earth will tip the rear wall over on its pivots rearwardly.

4. A drag line excavator comprising al bucket adaptedy to be dragged along the ground, having a rear wall mounted thereon fixed my signature.

and provided withA teeth ,on the Abottoni adapted to be projected below thesurface of the ground when said wall is empty, the

- rear wall being mounted on pivots located near the bottom and rear of the bucket and extending from said pivots upwardly Vand adapted, when filled with earth, to tipgover on itspivots rearwardly and raise the scraping teeth'to the surface of the ground on a v level with vthe bottom of the bucket.

5. ,In a drag line excavator', the combination with a pair o'fvside walls rigidly conf nected together, of a scraper constituting the rear wall of the bucket pivoted 'to the side beyond said pivots, and yielding `means for holding `the upper rear end of the scraper forward sol asto project the teeth surface ofthe ground. j

6.v In' Ya drag line excavator, the combination with a pair ofside walls `rigidly convwalls at the bottom thereof and having scraping teeth projecting forwardly thereon below the nected together, lof a scraper constituting the /rear wall 4of the bucket pivoted to the side walls at. the bottom thereof and having scraping teeth projecting forwardly thereon beyond said pivots, andl yielding means for 'holding the uppe1"rear end *of the scraper forward so vas to project the rteeth below the `surface of the ground,"said scraping teeth being located substantially entirelv at the front ofthe pivots', whereby, whenlfull, the` weight of the eartlrwill tip it over rearwardly into a position to draw the teeth up above the surface of the groundlv '7. ln a drag line excavator, thecombination with a* pair of sidewalls rigidly con` nected together, of a scraper constituting the rear'wallof the bucket pivotedto the side wallsat thebottom thereof and having scraping teeth projecting forwardly thereon bcyondsai'd pivots, yielding means for holding the upper rear end of the' scraper forward so as `to `project the teeth' below the surface of the ground, a cross barf connecting the sidewalls at the' rear in position to limit the 'rearwardv motion, of the scraper, and a cross bar connectingthe sides at the front to which said yielding 'means is connccted.

lntestimony whereof l have hereuntoafy fJosnPHr. rirzra'rnick." i 

